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Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytes

Paper ID Volume ID Publish Year Pages File Format Full-Text
48110 46493 2009 7 PDF Available
Title
Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytes
Abstract

This paper examines the electrochemical and electrocatalytic behaviour of tungsten carbide at ambient temperature and at near to neutral pH conditions. The electrocatalytic oxidation of hydrogen, formate and lactate is investigated as a function of the composition of the catalyst material, and of the composition and pH of the used electrolyte solutions. It is demonstrated that for the oxidation of hydrogen, different surface and bulk properties are decisive than for the oxidation of formate and lactate. A major problem of tungsten carbide is its stability in aqueous, pH neutral environments, in which noticeable corrosion processes take place. The individual corrosion rates strongly depend on the electrolyte composition and pH, and on the presence of reducing agents.

Graphical abstractThis paper examines the electrochemical and electrocatalytic behavior of tungsten carbide at ambient temperature and at near to neutral pH conditions.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Tungsten carbide; WC; Electrocatalysis; Microbial fuel cell; Corrosion; Biofuel cell
First Page Preview
Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytes
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 87, Issues 1–2, 16 March 2009, Pages 63–69
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis